Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 774 887
2) Placement test : grammar for beginners (lucile83) 5 986 019
3) A/AN (webmaster) 5 361 519
4) Auxiliary BE (webmaster) 3 222 485
5) Present continuous (webmaster) 2 996 898
6) Present simple (webmaster) 2 907 124
7) Present simple (webmaster) 2 595 266
8) Present continuous (webmaster) 2 429 645
9) Adjectives (webmaster) 2 092 466
10) A/an (anonyme) 2 013 291
11) Present perfect simple (webmaster) 1 639 160
12) Preterite (webmaster) 1 622 089
13) Vocabulary - Placement test (bridg) 1 618 295
14) Preterite (webmaster) 1 443 900
15) Short placement test (webmaster) 1 442 670
16) To be (bridg) 1 405 080
17) What time is it? (webmaster) 1 348 079
18) Present perfect (webmaster) 1 342 782
19) The alphabet in English (webmaster) 1 320 021
20) Adjectives (lucile83) 1 214 823
21) What time is it? (webmaster) 1 206 099
22) Numbers (webmaster) 1 187 976
23) 'A' ou 'An' (anonyme) 1 173 933
24) Two presents: present continuous, present simple (webmaster) 1 148 010
25) To be (bridg) 1 144 650
26) Comparatives / Superlatives (webmaster) 1 100 216
27) Numbers (webmaster) 1 069 700
28) CAN / MUST (webmaster) 1 057 793
29) THE/ A / AN / nothing (webmaster) 1 031 686
30) Comparatives (webmaster) 1 006 462
31) Family life (bridg) 999 848
32) Numbers > 100 (webmaster) 985 757
33) Future (going to/will/present continuous) (anonyme) 962 144
34) Plural (webmaster) 954 985
35) Superlatives (webmaster) 874 195
36) Adjectives (anonyme) 874 005
37) Simple present (bridg) 852 917
38) Spelled words N°1 (bridg) 849 410
39) Placement test beginners: Check your spelling (lucile83) 829 708
40) Introducing oneself (webmaster) 826 695
41) Adverbs of frequency (lucile83) 815 916
42) Family (bridg) 783 955
43) General test-End of high school / Beginning of university (webmaster) 782 093
44) Present simple (lucile83) 778 679
45) Frequency adverbs (webmaster) 777 160
46) Present BE + Ving (bridg) 764 080
47) Genitive (webmaster) 722 988
48) Family tree (anonyme) 718 793
49) Passive form (lucile83) 716 118
50) Preterite: simple or continuous? (webmaster) 715 471
51) Placement test (beginners) (lili73) 700 219
52) Past simple or present perfect (lucile83) 692 277
53) Future (webmaster) 675 398
54) 2 Preterites (webmaster) 661 021
55) Present perfect simple (bridg) 658 548
56) Preterite (webmaster) 619 156
57) List of 200 irregular verbs and audio (bridg) 615 280
58) Modals (webmaster) 612 219
59) Spelled words N°2 (bridg) 608 624
60) Height (webmaster) 605 938
61) Modals (webmaster) 603 934
62) Articles a / an / the (lucile83) 596 732
63) Plural forms (bridg) 576 768
64) Nationalities (webmaster) 573 760
65) Past continuous / Past simple (anonyme) 564 031
66) Irregular plurals (bridg) 552 985
67) Two presents: simple and continuous (webmaster) 549 041
68) Preterite (bridg) 548 281
69) Vocabulary: greeting people (here4u) 536 426
70) Superlatives (frapedur) 536 197
71) Give your opinion (bridg) 531 389
72) Adverbs of Frequency (bridg) 516 508
73) Present simple or continuous (lucile83) 509 090
74) Present perfect / preterite ? (anonyme) 507 413
75) Possessive case (anonyme) 480 094
76) Countries & nationalities (bridg) 472 860
77) 'The' or nothing? (webmaster) 470 870
78) Introducing oneself (easy) (webmaster) 470 377
79) Past tenses (bridg) 470 033
80) Passive voice (webmaster) 462 063
81) Present Simple vs. Past Simple (anonyme) 455 559
82) Questions : how to ask them (lucile83) 447 709
83) General Test II / End of high school / Beginning of universi (webmaster) 445 736
84) IN, ON, AT or TO? (webmaster) 444 490
85) Relative pronouns (webmaster) 443 586
86) Comparative of superiority (lucile83) 437 169
87) How to pronounce the final -ED? (past simple) (webmaster) 436 437
88) Relative clauses (webmaster) 422 728
89) Sounds: [h] (webmaster) 419 191
90) Comparative (anonyme) 412 505
91) A/an/Ø (bridg) 397 990
92) Future simple (lucile83) 395 435
93) Past simple (anonyme) 394 748
94) This / That / These / Those (webmaster) 392 158
95) Conditional (webmaster) 391 112
96) Passive voice (anonyme) 389 808
97) Comparing (webmaster) 387 703
98) Can / could/ may/ might (woodyrun) 378 903
99) Present perfect or past tense (anonyme) 376 296
100) Much, many, little and few (felin) 371 659
101) Personal pronouns (anonyme) 371 114
102) Preterite continuous (BE + -ING) (webmaster) 368 094
103) Some, any, no, enough, too/too much/too many (webmaster) 367 829
104) Genitive case (bridg) 367 408
105) Confusing words - Placement test (bridg) 364 369
106) Irregular verbs (webmaster) 363 056
107) Numbers from 1 to 10 (lucile83) 361 211
108) Past perfect simple, past perfect continuous (anonyme) 360 675
109) Present continuous or present simple (webmaster) 359 284
110) Present perfect or preterite? (anonyme) 355 703
111) Simple Past : regular verbs (anonyme) 352 082
112) Comparative Adjectives (bridg) 351 900
113) Who, Whom, Which, or Whose? (anonyme) 348 270
114) Past simple (video) (lucile83) 347 459
115) Past simple or past continuous (lucile83) 340 734
116) While / When (anonyme) 337 680
117) What time is it? (webmaster) 337 349
118) Modals (tinou) 336 195
119) Modal: may/might (lucile83) 333 863
120) Cardinal and ordinal numbers (anonyme) 328 391
121) Possessive adjectives and pronouns (woodyrun) 323 748
122) The superlative (anonyme) 323 721
123) How to talk about the weather (lili73) 320 847
124) Since and for (lucile83) 318 186
125) Flags (webmaster) 317 227
126) Irregular verbs (bridg) 315 583
127) Prepositions - in, on, at (anonyme) 313 843
128) Pronouns (woodyrun) 312 638
129) Tenses (anonyme) 311 294
130) Placement test 3 (webmaster) 310 104
131) Order of adjectives (webmaster) 306 275
132) Could/Couldn't (laure95) 305 558
133) Comparative (anonyme) 304 084
134) Adjectives and prepositions (lucile83) 303 849
135) Agreement Tags (webmaster) 303 762
136) Asking questions (webmaster) 302 810
137) Present perfect OR simple past? (bridg) 298 065
138) Questions in the past tense (lucile83) 297 114
139) Superlative Adjectives (bridg) 295 370
140) Uncountable nouns (webmaster) 295 239
141) Object pronouns (bridg) 294 120
142) Placement test 1 (lucile83) 292 398
143) Present simple (lucile83) 290 374
144) Passive form (anonyme) 289 228
145) Prefer/rather (bridg) 288 975
146) Can/Must/Should (laure95) 288 593
147) Must or Have to? (woodyrun) 286 671
148) Past perfect (lili73) 286 482
149) The/an/nothing (bridg) 284 804
150) To be (anonyme) 283 273
151) Vocabulary: asking and answering (here4u) 280 416
152) Can and can't (laure95) 279 874
153) Modal verbs (bridg) 277 021
154) Some / Any / no... (bridg) 270 041
155) Days of the week (bridg) 269 022
156) So / neither (anonyme) 264 144
157) Past simple (video) (lucile83) 263 426
158) Used to (bridg) 260 192
159) Should / must (anonyme) 259 102
160) Past tense (anonyme) 259 008
161) Vocabulary: on the phone (here4u) 258 683
162) Present continuous (chnawa) 258 675
163) Find out a quantity (webmaster) 258 407
164) Superlative + and adjective (lucile83) 256 828
165) Articles : a / an / the / Ø (anonyme) 255 491
166) Comparative and superlative (anonyme) 254 113
167) Numbers 1/100 (anonyme) 253 245
168) Modal can (video) (lucile83) 252 632
169) Relatives pronouns (who, which, that...) (anonyme) 247 787
170) Vocabulary: at the restaurant (here4u) 245 628
171) Comparatives (anonyme) 245 459
172) A few, a little, few, little (anonyme) 244 828
173) Would rather / would prefer to (anonyme) 244 061
174) Present continuous and the Going to form (anonyme) 242 272
175) Have something done (anonyme) 239 571
176) Should/ have to/ must (anonyme) 239 209
177) The past (webmaster) 237 677
178) Future continuous and future perfect. (felin) 237 364
179) Used to/would (woodyrun) 237 027
180) How to ask a question in English (bridg) 234 931
181) I wish, if only (felin) 233 891
182) Pluperfect (webmaster) 233 632
183) Countable or Uncountable? (webmaster) 232 871
184) Some / any (younes91) 231 774
185) Should / shouldn't (anonyme) 231 075
186) Present simple or continuous (bridg) 230 765
187) Adjectives - ing and ed (felin) 228 605
188) Hypothesis (webmaster) 227 812
189) Auxiliary BE (lucile83) 226 207
190) Articles a/an/the/0 (bridg) 226 013
191) Article The or nothing (anonyme) 225 684
192) Present perfect with Ever - never - (anonyme) 225 272
193) Present continuous OR Present simple? (bridg) 225 159
194) Must or mustn't (laure95) 224 499
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 631
196) To / in order to / so as to / so that (irish21) 219 558
197) Present perfect (bridg) 219 218
198) What time is it ? (anonyme) 217 404
199) Comparison (komiks) 217 023
200) Indirect speech (bridg) 215 917
