Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 774 988
2) Placement test : grammar for beginners (lucile83) 5 986 218
3) A/AN (webmaster) 5 361 617
4) Auxiliary BE (webmaster) 3 222 526
5) Present continuous (webmaster) 2 996 940
6) Present simple (webmaster) 2 907 324
7) Present simple (webmaster) 2 595 362
8) Present continuous (webmaster) 2 429 719
9) Adjectives (webmaster) 2 092 492
10) A/an (anonyme) 2 013 329
11) Present perfect simple (webmaster) 1 639 237
12) Preterite (webmaster) 1 622 335
13) Vocabulary - Placement test (bridg) 1 618 331
14) Preterite (webmaster) 1 444 035
15) Short placement test (webmaster) 1 442 690
16) To be (bridg) 1 405 102
17) What time is it? (webmaster) 1 348 096
18) Present perfect (webmaster) 1 342 862
19) The alphabet in English (webmaster) 1 320 041
20) Adjectives (lucile83) 1 214 845
21) What time is it? (webmaster) 1 206 149
22) Numbers (webmaster) 1 188 003
23) 'A' ou 'An' (anonyme) 1 173 962
24) Two presents: present continuous, present simple (webmaster) 1 148 046
25) To be (bridg) 1 144 669
26) Comparatives / Superlatives (webmaster) 1 100 282
27) Numbers (webmaster) 1 069 751
28) CAN / MUST (webmaster) 1 057 801
29) THE/ A / AN / nothing (webmaster) 1 031 725
30) Comparatives (webmaster) 1 006 478
31) Family life (bridg) 999 895
32) Numbers > 100 (webmaster) 985 778
33) Future (going to/will/present continuous) (anonyme) 962 186
34) Plural (webmaster) 954 998
35) Superlatives (webmaster) 874 218
36) Adjectives (anonyme) 874 020
37) Simple present (bridg) 852 978
38) Spelled words N°1 (bridg) 849 419
39) Placement test beginners: Check your spelling (lucile83) 829 715
40) Introducing oneself (webmaster) 826 712
41) Adverbs of frequency (lucile83) 815 960
42) Family (bridg) 783 978
43) General test-End of high school / Beginning of university (webmaster) 782 109
44) Present simple (lucile83) 778 721
45) Frequency adverbs (webmaster) 777 181
46) Present BE + Ving (bridg) 764 094
47) Genitive (webmaster) 722 996
48) Family tree (anonyme) 718 806
49) Passive form (lucile83) 716 348
50) Preterite: simple or continuous? (webmaster) 715 499
51) Placement test (beginners) (lili73) 700 261
52) Past simple or present perfect (lucile83) 692 307
53) Future (webmaster) 675 407
54) 2 Preterites (webmaster) 661 048
55) Present perfect simple (bridg) 658 586
56) Preterite (webmaster) 619 216
57) List of 200 irregular verbs and audio (bridg) 615 292
58) Modals (webmaster) 612 232
59) Spelled words N°2 (bridg) 608 630
60) Height (webmaster) 605 952
61) Modals (webmaster) 603 968
62) Articles a / an / the (lucile83) 596 732
63) Plural forms (bridg) 576 779
64) Nationalities (webmaster) 573 773
65) Past continuous / Past simple (anonyme) 564 077
66) Irregular plurals (bridg) 552 996
67) Two presents: simple and continuous (webmaster) 549 046
68) Preterite (bridg) 548 291
69) Vocabulary: greeting people (here4u) 536 426
70) Superlatives (frapedur) 536 250
71) Give your opinion (bridg) 531 404
72) Adverbs of Frequency (bridg) 516 523
73) Present simple or continuous (lucile83) 509 131
74) Present perfect / preterite ? (anonyme) 507 446
75) Possessive case (anonyme) 480 111
76) Countries & nationalities (bridg) 472 872
77) 'The' or nothing? (webmaster) 470 878
78) Introducing oneself (easy) (webmaster) 470 390
79) Past tenses (bridg) 470 051
80) Passive voice (webmaster) 462 115
81) Present Simple vs. Past Simple (anonyme) 455 597
82) Questions : how to ask them (lucile83) 447 721
83) General Test II / End of high school / Beginning of universi (webmaster) 445 748
84) IN, ON, AT or TO? (webmaster) 444 501
85) Relative pronouns (webmaster) 443 620
86) Comparative of superiority (lucile83) 437 224
87) How to pronounce the final -ED? (past simple) (webmaster) 436 459
88) Relative clauses (webmaster) 422 742
89) Sounds: [h] (webmaster) 419 198
90) Comparative (anonyme) 412 516
91) A/an/Ø (bridg) 398 006
92) Future simple (lucile83) 395 468
93) Past simple (anonyme) 394 788
94) This / That / These / Those (webmaster) 392 171
95) Conditional (webmaster) 391 124
96) Passive voice (anonyme) 389 828
97) Comparing (webmaster) 387 707
98) Can / could/ may/ might (woodyrun) 378 910
99) Present perfect or past tense (anonyme) 376 315
100) Much, many, little and few (felin) 371 674
101) Personal pronouns (anonyme) 371 120
102) Preterite continuous (BE + -ING) (webmaster) 368 119
103) Some, any, no, enough, too/too much/too many (webmaster) 367 831
104) Genitive case (bridg) 367 414
105) Confusing words - Placement test (bridg) 364 370
106) Irregular verbs (webmaster) 363 065
107) Numbers from 1 to 10 (lucile83) 361 224
108) Past perfect simple, past perfect continuous (anonyme) 360 678
109) Present continuous or present simple (webmaster) 359 292
110) Present perfect or preterite? (anonyme) 355 728
111) Simple Past : regular verbs (anonyme) 352 090
112) Comparative Adjectives (bridg) 351 905
113) Who, Whom, Which, or Whose? (anonyme) 348 306
114) Past simple (video) (lucile83) 347 534
115) Past simple or past continuous (lucile83) 340 770
116) While / When (anonyme) 337 690
117) What time is it? (webmaster) 337 365
118) Modals (tinou) 336 199
119) Modal: may/might (lucile83) 333 871
120) Cardinal and ordinal numbers (anonyme) 328 405
121) The superlative (anonyme) 323 812
122) Possessive adjectives and pronouns (woodyrun) 323 752
123) How to talk about the weather (lili73) 320 848
124) Since and for (lucile83) 318 196
125) Flags (webmaster) 317 235
126) Irregular verbs (bridg) 315 588
127) Prepositions - in, on, at (anonyme) 313 872
128) Pronouns (woodyrun) 312 658
129) Tenses (anonyme) 311 314
130) Placement test 3 (webmaster) 310 122
131) Order of adjectives (webmaster) 306 282
132) Could/Couldn't (laure95) 305 562
133) Comparative (anonyme) 304 090
134) Adjectives and prepositions (lucile83) 303 855
135) Agreement Tags (webmaster) 303 765
136) Asking questions (webmaster) 302 812
137) Present perfect OR simple past? (bridg) 298 065
138) Questions in the past tense (lucile83) 297 117
139) Superlative Adjectives (bridg) 295 383
140) Uncountable nouns (webmaster) 295 247
141) Object pronouns (bridg) 294 124
142) Placement test 1 (lucile83) 292 403
143) Present simple (lucile83) 290 388
144) Passive form (anonyme) 289 253
145) Prefer/rather (bridg) 288 984
146) Can/Must/Should (laure95) 288 601
147) Must or Have to? (woodyrun) 286 678
148) Past perfect (lili73) 286 507
149) The/an/nothing (bridg) 284 809
150) To be (anonyme) 283 280
151) Vocabulary: asking and answering (here4u) 280 417
152) Can and can't (laure95) 279 895
153) Modal verbs (bridg) 277 031
154) Some / Any / no... (bridg) 270 052
155) Days of the week (bridg) 269 022
156) So / neither (anonyme) 264 152
157) Past simple (video) (lucile83) 263 428
158) Used to (bridg) 260 192
159) Should / must (anonyme) 259 108
160) Past tense (anonyme) 259 015
161) Present continuous (chnawa) 258 699
162) Vocabulary: on the phone (here4u) 258 695
163) Find out a quantity (webmaster) 258 414
164) Superlative + and adjective (lucile83) 256 843
165) Articles : a / an / the / Ø (anonyme) 255 510
166) Comparative and superlative (anonyme) 254 136
167) Numbers 1/100 (anonyme) 253 250
168) Modal can (video) (lucile83) 252 638
169) Relatives pronouns (who, which, that...) (anonyme) 247 787
170) Vocabulary: at the restaurant (here4u) 245 628
171) Comparatives (anonyme) 245 493
172) A few, a little, few, little (anonyme) 244 832
173) Would rather / would prefer to (anonyme) 244 063
174) Present continuous and the Going to form (anonyme) 242 274
175) Have something done (anonyme) 239 573
176) Should/ have to/ must (anonyme) 239 338
177) The past (webmaster) 237 678
178) Future continuous and future perfect. (felin) 237 368
179) Used to/would (woodyrun) 237 065
180) How to ask a question in English (bridg) 234 939
181) I wish, if only (felin) 233 892
182) Pluperfect (webmaster) 233 639
183) Countable or Uncountable? (webmaster) 232 871
184) Some / any (younes91) 231 800
185) Should / shouldn't (anonyme) 231 080
186) Present simple or continuous (bridg) 230 765
187) Adjectives - ing and ed (felin) 228 606
188) Hypothesis (webmaster) 227 816
189) Auxiliary BE (lucile83) 226 210
190) Articles a/an/the/0 (bridg) 226 023
191) Article The or nothing (anonyme) 225 695
192) Present perfect with Ever - never - (anonyme) 225 274
193) Present continuous OR Present simple? (bridg) 225 162
194) Must or mustn't (laure95) 224 529
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 632
196) To / in order to / so as to / so that (irish21) 219 567
197) Present perfect (bridg) 219 226
198) What time is it ? (anonyme) 217 409
199) Comparison (komiks) 217 049
200) Indirect speech (bridg) 215 930
