Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 772 484
2) Placement test : grammar for beginners (lucile83) 5 982 369
3) A/AN (webmaster) 5 358 969
4) Auxiliary BE (webmaster) 3 221 235
5) Present continuous (webmaster) 2 995 262
6) Present simple (webmaster) 2 902 534
7) Present simple (webmaster) 2 593 840
8) Present continuous (webmaster) 2 426 689
9) Adjectives (webmaster) 2 091 644
10) A/an (anonyme) 2 011 855
11) Present perfect simple (webmaster) 1 637 014
12) Preterite (webmaster) 1 618 928
13) Vocabulary - Placement test (bridg) 1 617 651
14) Short placement test (webmaster) 1 442 017
15) Preterite (webmaster) 1 441 798
16) To be (bridg) 1 404 194
17) What time is it? (webmaster) 1 347 345
18) Present perfect (webmaster) 1 340 785
19) The alphabet in English (webmaster) 1 319 256
20) Adjectives (lucile83) 1 213 955
21) What time is it? (webmaster) 1 205 089
22) Numbers (webmaster) 1 187 522
23) 'A' ou 'An' (anonyme) 1 172 750
24) Two presents: present continuous, present simple (webmaster) 1 146 848
25) To be (bridg) 1 143 941
26) Comparatives / Superlatives (webmaster) 1 098 110
27) Numbers (webmaster) 1 068 977
28) CAN / MUST (webmaster) 1 057 312
29) THE/ A / AN / nothing (webmaster) 1 030 355
30) Comparatives (webmaster) 1 006 011
31) Family life (bridg) 999 149
32) Numbers > 100 (webmaster) 985 276
33) Future (going to/will/present continuous) (anonyme) 961 433
34) Plural (webmaster) 954 319
35) Superlatives (webmaster) 873 704
36) Adjectives (anonyme) 873 295
37) Simple present (bridg) 852 299
38) Spelled words N°1 (bridg) 848 753
39) Placement test beginners: Check your spelling (lucile83) 829 466
40) Introducing oneself (webmaster) 826 323
41) Adverbs of frequency (lucile83) 815 003
42) Family (bridg) 783 406
43) General test-End of high school / Beginning of university (webmaster) 781 682
44) Present simple (lucile83) 777 778
45) Frequency adverbs (webmaster) 776 639
46) Present BE + Ving (bridg) 763 412
47) Genitive (webmaster) 722 542
48) Family tree (anonyme) 718 264
49) Preterite: simple or continuous? (webmaster) 714 911
50) Passive form (lucile83) 713 009
51) Placement test (beginners) (lili73) 699 704
52) Past simple or present perfect (lucile83) 691 191
53) Future (webmaster) 675 108
54) 2 Preterites (webmaster) 660 472
55) Present perfect simple (bridg) 657 154
56) Preterite (webmaster) 618 317
57) List of 200 irregular verbs and audio (bridg) 614 731
58) Modals (webmaster) 611 903
59) Spelled words N°2 (bridg) 608 136
60) Height (webmaster) 605 601
61) Modals (webmaster) 602 988
62) Articles a / an / the (lucile83) 596 711
63) Plural forms (bridg) 576 241
64) Nationalities (webmaster) 573 328
65) Past continuous / Past simple (anonyme) 562 090
66) Irregular plurals (bridg) 552 485
67) Two presents: simple and continuous (webmaster) 548 739
68) Preterite (bridg) 547 882
69) Vocabulary: greeting people (here4u) 536 381
70) Superlatives (frapedur) 534 818
71) Give your opinion (bridg) 530 948
72) Adverbs of Frequency (bridg) 516 174
73) Present simple or continuous (lucile83) 507 794
74) Present perfect / preterite ? (anonyme) 506 332
75) Possessive case (anonyme) 479 684
76) Countries & nationalities (bridg) 472 420
77) 'The' or nothing? (webmaster) 470 502
78) Introducing oneself (easy) (webmaster) 470 128
79) Past tenses (bridg) 469 581
80) Passive voice (webmaster) 461 493
81) Present Simple vs. Past Simple (anonyme) 454 610
82) Questions : how to ask them (lucile83) 447 359
83) General Test II / End of high school / Beginning of universi (webmaster) 445 502
84) IN, ON, AT or TO? (webmaster) 444 155
85) Relative pronouns (webmaster) 443 114
86) Comparative of superiority (lucile83) 436 669
87) How to pronounce the final -ED? (past simple) (webmaster) 435 850
88) Relative clauses (webmaster) 422 428
89) Sounds: [h] (webmaster) 418 960
90) Comparative (anonyme) 411 916
91) A/an/Ø (bridg) 397 508
92) Future simple (lucile83) 394 931
93) Past simple (anonyme) 392 893
94) This / That / These / Those (webmaster) 391 896
95) Conditional (webmaster) 390 782
96) Passive voice (anonyme) 389 459
97) Comparing (webmaster) 387 515
98) Can / could/ may/ might (woodyrun) 378 556
99) Present perfect or past tense (anonyme) 375 770
100) Personal pronouns (anonyme) 371 041
101) Much, many, little and few (felin) 370 998
102) Some, any, no, enough, too/too much/too many (webmaster) 367 666
103) Preterite continuous (BE + -ING) (webmaster) 367 509
104) Genitive case (bridg) 366 937
105) Confusing words - Placement test (bridg) 364 283
106) Irregular verbs (webmaster) 362 793
107) Numbers from 1 to 10 (lucile83) 360 968
108) Past perfect simple, past perfect continuous (anonyme) 360 556
109) Present continuous or present simple (webmaster) 359 078
110) Present perfect or preterite? (anonyme) 354 910
111) Comparative Adjectives (bridg) 351 732
112) Simple Past : regular verbs (anonyme) 351 704
113) Who, Whom, Which, or Whose? (anonyme) 347 985
114) Past simple (video) (lucile83) 346 995
115) Past simple or past continuous (lucile83) 339 792
116) What time is it? (webmaster) 337 083
117) While / When (anonyme) 336 724
118) Modals (tinou) 335 969
119) Modal: may/might (lucile83) 333 654
120) Cardinal and ordinal numbers (anonyme) 328 041
121) Possessive adjectives and pronouns (woodyrun) 323 458
122) The superlative (anonyme) 323 029
123) How to talk about the weather (lili73) 320 823
124) Since and for (lucile83) 317 941
125) Flags (webmaster) 316 990
126) Irregular verbs (bridg) 315 361
127) Prepositions - in, on, at (anonyme) 313 726
128) Pronouns (woodyrun) 312 050
129) Tenses (anonyme) 310 808
130) Placement test 3 (webmaster) 309 942
131) Order of adjectives (webmaster) 306 029
132) Could/Couldn't (laure95) 305 390
133) Comparative (anonyme) 303 893
134) Adjectives and prepositions (lucile83) 303 756
135) Agreement Tags (webmaster) 303 538
136) Asking questions (webmaster) 302 546
137) Present perfect OR simple past? (bridg) 297 907
138) Questions in the past tense (lucile83) 296 872
139) Superlative Adjectives (bridg) 295 088
140) Uncountable nouns (webmaster) 295 005
141) Object pronouns (bridg) 293 759
142) Placement test 1 (lucile83) 292 087
143) Present simple (lucile83) 289 889
144) Prefer/rather (bridg) 288 725
145) Can/Must/Should (laure95) 288 343
146) Passive form (anonyme) 288 339
147) Must or Have to? (woodyrun) 286 354
148) Past perfect (lili73) 285 520
149) The/an/nothing (bridg) 284 586
150) To be (anonyme) 283 144
151) Vocabulary: asking and answering (here4u) 280 393
152) Can and can't (laure95) 279 276
153) Modal verbs (bridg) 276 890
154) Some / Any / no... (bridg) 269 825
155) Days of the week (bridg) 268 960
156) So / neither (anonyme) 264 027
157) Past simple (video) (lucile83) 263 244
158) Used to (bridg) 260 074
159) Should / must (anonyme) 258 894
160) Past tense (anonyme) 258 815
161) Vocabulary: on the phone (here4u) 258 655
162) Find out a quantity (webmaster) 258 347
163) Present continuous (chnawa) 257 569
164) Superlative + and adjective (lucile83) 256 516
165) Articles : a / an / the / Ø (anonyme) 254 741
166) Comparative and superlative (anonyme) 253 544
167) Numbers 1/100 (anonyme) 253 039
168) Modal can (video) (lucile83) 252 494
169) Relatives pronouns (who, which, that...) (anonyme) 247 763
170) Vocabulary: at the restaurant (here4u) 245 597
171) A few, a little, few, little (anonyme) 244 516
172) Would rather / would prefer to (anonyme) 243 944
173) Comparatives (anonyme) 243 829
174) Present continuous and the Going to form (anonyme) 242 136
175) Have something done (anonyme) 239 452
176) Should/ have to/ must (anonyme) 238 864
177) The past (webmaster) 237 570
178) Future continuous and future perfect. (felin) 237 245
179) Used to/would (woodyrun) 236 667
180) How to ask a question in English (bridg) 234 548
181) I wish, if only (felin) 233 776
182) Pluperfect (webmaster) 233 499
183) Countable or Uncountable? (webmaster) 232 725
184) Some / any (younes91) 231 180
185) Should / shouldn't (anonyme) 230 907
186) Present simple or continuous (bridg) 230 758
187) Adjectives - ing and ed (felin) 228 419
188) Hypothesis (webmaster) 227 582
189) Auxiliary BE (lucile83) 226 093
190) Articles a/an/the/0 (bridg) 225 899
191) Article The or nothing (anonyme) 225 508
192) Present perfect with Ever - never - (anonyme) 225 185
193) Present continuous OR Present simple? (bridg) 225 003
194) Must or mustn't (laure95) 224 140
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 507
196) To / in order to / so as to / so that (irish21) 219 269
197) Present perfect (bridg) 219 100
198) What time is it ? (anonyme) 217 324
199) Comparison (komiks) 216 212
200) Indirect speech (bridg) 215 615
